contrast, parallel processing starts with a network or grid containing a processor at each node. Writes Hiatt: "Elements in a grid trade off information, then pass a processed array of new information through further grids or layers of parallel processors . . . until a suitable level of representation or deci- sion making is reached." Human vision probably works this way, but at speeds no machine can match. A rudimentary parallel processor is due to be completed at the University of Maryland...